1. INTRO TO CHEMISTRY
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2. Which of the following is NOT matter?
SMOKE
AIR
LIGHT
SAND

3. Light is a form of energy and energy is NOT matter!
VERY GOOD!!
LIGHT
Light is a form of energy and energy is NOT matter!
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4. INCORRECT
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5. Which of the following is NOT one of the three physical states of matter?
Solid
Liquid
Gas
Aqueous

6. Solid, liquid, and gas are the three physical states of matter
Very good!
Aqueous
Solid, liquid, and gas are the three physical states of matter
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7. INCORRECT
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8. Which of the following best describes carbon monoxide (CO)?
Element
Compound
Homogeneous mixture
Heterogeneous mixture

9. Very Good!
Compound
Carbon monoxide (CO) is a compound. It is made up of two or more elements CHEMICALLY combined.
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10. INCORRECT
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11. Salt water is an example of a…
Element
Compound
Homogeneous mixture
Heterogeneous mixture

12. Very good!
Homogeneous mixture
Salt water is an example of a homogeneous mixture. The mixture looks uniform throughout. However, it is a mixture because both the salt and the water maintain their original properties and can be physically separated.
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13. INCORRECT
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14. Which of the following CANNOT be broken down into a simpler substance?
Oil and water
Juice
Carbon (C)
Sodium chloride (NaCl)

15. Very Good!
Carbon (C)
Carbon is an element. Elements cannot be broken into simpler substances. Sodium chloride is a compound, oil and water is a heterogeneous mixture, and juice is a homogeneous mixture. All three of these can be broken into simpler substances.
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16. INCORRECT
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17. The following are observations of what happens when two solutions are mixed. Which is NOT evidence that a chemical reaction has occurred?
There is fizzing and bubbling
The test tube feels hotter
One of the solutions was yellow to start
A solid forms

18. One of the solutions was yellow to start
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One of the solutions was yellow to start
Production of a gas (seen by the fizzing and bubbling), energy released (the test tube felt hotter), and the formation of a solid are all evidence that a chemical reaction has occurred.
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19. INCORRECT
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20. Which of the following is an example of a chemical change?
Breaking a pencil in half
Salt dissolving in water
The corrosion of metal
Grinding garlic

21. Remember in a chemical change…something NEW is produced
Very good!
The corrosion of metal
Remember in a chemical change…something NEW is produced
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22. INCORRECT
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23. Phase changes are an example of a…
Chemical property
Physical change
Chemical change
Extensive property

24. Very good!
Physical change
A phase change is only a change in state of mater so it is a physical change.
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25. INCORRECT
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26. What would be the correct symbol for when solid salt (NaCl) is melted?
NaCl (s)
NaCl (l)
NaCl (g)
NaCl (aq)

27. Very good!
NaCl (l)
When salt is melted it becomes a liquid. Remember that a liquid is different than an aqueous solution. An aqueous solution is made when a solid is dissolved in water.
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28. INCORRECT
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29. Mercury is a silver colored liquid
Mercury is a silver colored liquid. The silver color of mercury is an example of a ….
Intensive physical property
Chemical property
Extensive physical property
Physical change

30. Intensive physical property
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Intensive physical property
Intensive properties to not depend on the amount of a substance. Extensive properties DO depend on the amount of a substance…like mass or length
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31. INCORRECT
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32. A and B produce solid products
What is true about the following reaction: A (s) + B (aq)  C (g) + D (aq)
C and D are reactants
D is a solid
A and B produce solid products
A and B are reactants

33. A chemical reaction has this general form: Reactants  Products
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A and B are reactants
A chemical reaction has this general form: Reactants  Products
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34. INCORRECT
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35. SCIENTIFIC NOTATION & SIG FIGS
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36. How do you write 0.00560 in scientific notation?
5.60 x 10-3
0.560 x 10-2
56.0 x 10-4
0.560 x 102
5.60 x 103

37. Very good!
5.60 x 10-3
Remember that when writing a number in scientific notation, there should be ONE number to the LEFT of the decimal. Since the number is less than 1, the exponent should be negative.
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38. INCORRECT
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39. 3.6 x 105 could be also written as…
360000

40. Very good!
360000
Since the exponent is positive, your decimal should be moving to the right.
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41. INCORRECT
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42. How many sig figs are in the 0.0003005600?4 11 10 3 7

43. Very good! 7
Remember that zeros in front of a number are placeholder zeros and are NOT significant. Terminating zeros to the right of the decimal are significant. Any zero in between significant numbers is significant
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44. INCORRECT
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45. How many sig figs are in the 70800000?3 4 2

46. Very good! 3
Remember that zeros after a number but before the decimal are placeholder zeros and are NOT significant. Any zero in between significant numbers is significant
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47. INCORRECT
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48. What is the correct answer to the following problem: 7.815 + 2.07 =
9.885
9.89
9.88
9.9

49. Very good!
9.89
= When adding or subtracting two numbers, your answer should have the same number of decimal places as the measurement with the least number of decimal places has two decimal places so your answer should be rounded to 9.89
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50. INCORRECT
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51. CLOSE! But not quite correct…don’t forget about rounding!
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52. What is the correct answer to the following problem: 8.670 x 0.54 =
4.682
4.7
4.6818
4.68

53. Very good!
4.7
8.670 x 0.54 = When you multiply or divide two numbers your answer should have the same number of total sig figs as the answer with the fewest sig figs has two sig figs so your answer should be rounded to 4.7
Done!
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54. INCORRECT
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55. Great Job! Good luck on your quiz!
I’m in chemistry
I’m in honors chemistry
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56. Chemistry
Don’t forget to also study how to record a measurement with the correct number of significant figures
Finish the quiz review given in class for homework due Monday.
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57. Honors Chemistry
Half of your quiz will be on the information in the presentation, the other half will be on dimensional analysis
Don’t forget that the three dimensional analysis worksheets are due on Monday
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